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Publication:3791634
zbMath0647.42005MaRDI QIDQ3791634
A. V. Kushpel', A. I. Stepanets
Publication date: 1987
Title: zbMATH Open Web Interface contents unavailable due to conflicting licenses.
Best approximation, Chebyshev systems (41A50) Abstract approximation theory (approximation in normed linear spaces and other abstract spaces) (41A65) Convergence and absolute convergence of Fourier and trigonometric series (42A20)
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Best approximation by an angle and approximation by an angle of singular integrals of functions \(f\in L_ p(R_ n)\), \(2<p<\infty\) ⋮ Approximating characteristics of the classes \(L_{\beta,p}^\psi\) of periodic functions in the space \(L_q\) ⋮ Order estimates for the best approximations and approximations by Fourier sums of the classes of \((\psi, \beta)\)-differential functions
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